If προστίθησι be the right reading, it would almost seem that Gregory had forgotten the order of the passages, and supposed Prov. viii. 22 to have been written after Prov. ix. 1. To read προτίθησι, (“presents to us”) would get rid of this difficulty, but it may be that Gregory only intends to point out that the idea of the union of the two natures, from which the “communicatio idiomatum” results, is distinct from that of the preparation for the Nativity, not to insist upon the order in which, as he conceives, they are set forth in the book of Proverbs.